438730738 has 4 divisors (see below), whose sum is σ = 658096110. Its totient is φ = 219365368.

The previous prime is 438730697. The next prime is 438730741. The reversal of 438730738 is 837037834.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 239723289 + 199007449 = 15483^2 + 14107^2 .

It is a junction number, because it is equal to n+sod(n) for n = 438730694 and 438730703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109682683 + ... + 109682686.

Almost surely, 2^438730738 is an apocalyptic number.

438730738 is a deficient number, since it is larger than the sum of its proper divisors (219365372).

438730738 is a wasteful number, since it uses less digits than its factorization.

438730738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219365371.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 438730738 is about 20945.9002671167. The cubic root of 438730738 is about 759.8584327728.

The spelling of 438730738 in words is "four hundred thirty-eight million, seven hundred thirty thousand, seven hundred thirty-eight".